{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{6}{c}}
\hline\hline
          &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         &\multicolumn{1}{c}{(5)}         &\multicolumn{1}{c}{(6)}         \\
\hline
ST        &   -0.085         &   -0.129         &   -0.160\sym{**} &   -0.246\sym{*}  &    0.089         &    0.170         \\
          &  (0.069)         &  (0.161)         &  (0.068)         &  (0.138)         &  (0.110)         &  (0.236)         \\
ST\_ES2    &   -0.148\sym{**} &   -0.200         &                  &                  &                  &                  \\
          &  (0.070)         &  (0.142)         &                  &                  &                  &                  \\
ST\_TL     &                  &                  &    0.094         &    0.194         &                  &                  \\
          &                  &                  &  (0.074)         &  (0.150)         &                  &                  \\
ST\_edu    &                  &                  &                  &                  &   -0.235\sym{**} &   -0.391\sym{*}  \\
          &                  &                  &                  &                  &  (0.107)         &  (0.203)         \\
\hline
\(N\)     &    13169         &    11472         &    13169         &    11472         &    13376         &    11645         \\
\(R^{2}\) &    0.051         &    0.053         &    0.051         &    0.053         &    0.051         &    0.054         \\
\hline\hline
\end{tabular}
}
